Combined pump and motor



(No Model.)

T. HENDERSON.

COMBINED PUMP AND MOTOR.

No. 474,248 Patented May 3, 1892.

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UNITED STATES PATENT @FFICE.

THOMAS HENDERSON, OF DALLAS, TEXAS.

COMBINED PUMP AND MOTOR.

SPECIFICATION forming part of Letters Patent No. 474,248, dated May 3, 1892.- Application filed December 31, 1891. Serial No. 4166384. (N0 model.)

To all whom it may concern.-

Be it known that I, THoMAs HENDERSON, of Dallas, in the county of Dallas and State of Texas, have invented a new and Improved Combined Pump and Motor, of which the following is a full, clear, and exact description.

My invention relates to improvements in combination motors and pumps; and the object of my invention isto produce a simple apparatus which may be connected with a main water or service pipe and which will operate by the fluctuation of pressure in said main or pipe so as to operate the pump.

The device is especially advantageous in raising water from a well or cistern to a tank placed at a higher elevation, or it may be placed on a pump in place of an air-chamber and used as a feed-pump for a boiler or on a hydraulic ram as an auxiliary pump.

To this end my invention consists in certain features of construction and combinations of the same, which will be hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures of reference indicate corresponding parts in both the views.

Figure 1 is a side elevation of the apparatus embodying my invention, showing it connected with a water-main and with a well and tank-pipe; and Fig. 2 is a vertical cross-section through the pump and motor.

The motor is provided with a main cylinder 10, which is open at the top and which, as shown in the drawings, is mounted on legs 11, although it may be supported in any convenient way. The bottom of the cylinder is closed, except for a central inlet-pipe 12, which is adapted to connect with a water-main, service pipe, or any other fluctuating body of water; but any equivalent pump-cylinder may be used. This pipe 12 is usually connected to a water-main, and in this case a pipe 13 is coupled to the pipe 12 and also to the main 14. Secured to the top of the cylinder and extending centrally above it is a yoke 15, which carries a cylinder 16, which is open at the bottom and which is of a very much smaller cross-section than the cylinder 10. The cylinder 16 is coupled to a pipe 17, which enters a T 18, the T connecting at one end with an ordinary check-valve 19, which connects with a pipe 20, leading to a well or other water-supply, and the opposite end of the T 18 connects by means of avalve 21 with a pipe 22, leading to a tank or other reservoir arranged at a higher elevation than the motor and pump. 'Within the cylinder 16 is a vertically-reciprocating piston 23, the piston-rod 24 of which extends downward and is secured to the piston 24, which moves in the cylinder 10.

The piston-rod 24 is encircled by a spiral spring 25, the upper end of which fits against the yoke and the lower end of which is supported on a plate 26, through the edges of which plate extend vertically the bolts 27 and the bolts impinge on the piston 24 It Wlll thus be seen that the bolts 27 may be turned so as to increase or diminish the resistance of the spring 25.

It will be'noticed that the valve 19 provides for the free inflow of water to the T 18 and cylinder 16, but prevents the return of the water, and the valve 21, which is similar to the valve 19, provides for the free inlet into the pipe 22, but prevents the return to the T 18.

WVater which comes from the pipe flows in through the valve 19 and fills the T and the upper portion of the cylinder 16. Then the pressure rises in the main or service pipe, the same pressure effects the water in the lower portion of the cylinder 10, thus raising the piston 24 against the resistance of the spring and forcing upward the piston 23. The upward movement of this piston forces the water out through the valve 21 into the pipe 22. When the water-pressure in the cylinder 1O diminishes, the resistance of the spring 25 pushes back the piston 24 to its former position, and when the pressure again increases the pistons 24 and 23 are again raised and more water is forced into the pipe 22. This operation will be constantly repeated, and while the stroke of the piston will vary greatly, still every upstroke of the piston will force water into the pipe 22 and a constant supply will be maintained.

As the piston 24 is operated by the fluctuation of the water in the main and not by direct consumption of water, it will be seen that it will cost practically nothing to run the motor and pump, and they will supply sufficient Water for an ordinary tank.

Having thus described my invention, 1,

claim as new and desire to secure by Letters Patent- A combined pump and motor comprising two cylinders of different diameters provided with connected pistons and a spring adj ustably mounted 011 the piston-rod between the Two pistons and forcing the pistons in one direction to cause the smaller piston to act as a section-pump to supply the smaller cylinder, a centrally-apertured cross-piece 26, on which the lower end of the spring bears and through which the rod freely passes, exposed screws 27, passing through the cr0ss-piece and bearing on the outer side of the larger piston, a

coupling to connect the larger cylinder below its piston with a Water-supply of fluctuating pressure to move the pistons against the action of the spring and force the water out of the smaller cylinder, an inlet-pipe leading to the smaller cylinder above its piston and separateand independent of said coupling,acheckvalve in said pipe, and an outlet-pipe leading from said smaller cylinder and provided with a check-valve, substantially as set forth.

THOMAS HENDERSON. Witnesses:

.T. S. 000K, F. E. SNYDER. 

